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7 Servicing
7.1 Safety notes on servicing
Failure to carry out maintenance and service
work properly can have severe consequences,
including the loss of life. Pay close attention to
the following safety notes.
Qualified personnel
Only qualified and experienced personnel must carry out
maintenance and service work.
Before all maintenance and service work:
1. Electrically isolate the equipment.
2. Close the ball valve.
3. Remove the 7-pole connection plug from the appliance
controller.
After all maintenance and service work:
1. Function test with ball valve closed.
2. Check flue gas losses and CO
2
/ O
2
/ CO values.
3. Complete a test sheet.
Endangering operational safety
Maintenance work on the following individual components
may only be carried out by the manufacturer or their
appointed agent:
• Servomotor
• Flame sensor
• Combustion manager
• Gas pressure switch
• Air pressure switch
Risk of explosion due to a gas leak
Take care when dismantling and assembling parts in the
gas line to ensure they are correctly aligned, clean and in
good condition, and that the fixing screws are correctly
tightened.
Danger of getting burnt!
Some burner parts (e.g. flame tube, burner
flange, electrodes, etc.) become hot during
burner operation and should be allowed to
cool prior to service work being carried out.
7.2 Servicing plan
Service interval
The operator should ensure that combustion plant is
serviced at least
- once a year -
by an agent of the supplier or other suitably qualified
person.
Test and clean
• Fan wheel and air inlet (see Ch. 7.6 and 7.7)
• Ignition equipment (see Ch. 7.5)
• Combustion head and diffuser (see Ch. 7.4)
• Filter insert (see Ch. 7.12)
• Air damper (see Ch. 7.6 ,7.10)
• Servomotor / mechanisms (see Ch. 7.8)
• Flame sensor
Function test
• Operation of the burner with the sequence of
operations (see Ch. 5.4 and 5.5)
• Ignition equipment
• Air pressure switch
• Gas pressure switch
• Flame monitoring
• Soundness test of gas valve trains (see CH. 4.6)
• Purging valve trains (when replacing; see CH. 5.2)
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